But the money is not expected to benefit the public finances as the majority needs to be spent on British domestic replacements for EU programmes.
It comes as the government's own Office for Budget Responsibility (OBR) puts the cost to the British economy of Brexit so far at around 2 per cent of GDP a year, or about £40 billion.
"We estimate that the economic effects of the referendum vote have so far reduced potential output by around 2 per cent, relative to what would have happened in its absence," the OBR said in its analysis released alongside the budget.
"Part of this reflects lower net inward migration, but mostly it reflects weaker productivity growth on the back of depressed business investment and the diversion of resources from production towards preparing for potential Brexit outcomes."